Macro is included in Microsoft Word and it will display a list of all the commands, where is it located, and you can see their shortcut keys.
Below is the step:
1. Go to the Tools menu and select Macro
2. locate and click Macros on the submenu
3. In the Macro in drop-down, select Word commands
4. In the Macro name box, scroll to find ListCommands and select it
5. Then click the Run button
6. When the List Commands box appears, select Current menu and keyboard settings for an abbreviated list or All word commands for an exhaustive list
7. Click the OK button now
A table of the commands will appear in a new document. You can either print the document (make sure you have enough paper in your printer!), or you can save it to disk for future reference.
source:http://wordprocessing.about.com